US2006160955A1PendingUtilityA1

Method for inhibiting agglomeration of block copolymers

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Assignee: FIRESTONE POLYMERS LLCPriority: Jan 14, 2005Filed: Jan 11, 2006Published: Jul 20, 2006
Est. expiryJan 14, 2025(expired)· nominal 20-yr term from priority
Inventors:Peter W. BoernerDaniel F. Graves
C08C 19/00C08F 297/023C08F 297/044C08F 297/04C08K 5/0008C08L 53/02C08C 19/44C08F 8/00C08L 95/00C08F 297/02
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Claims

Abstract

A method for inhibiting agglomeration of a block copolymer is presented, the method including coupling a plurality of block copolymer segments with a degradable coupling agent and thereafter drying the coupled block copolymer.

Claims

exact text as granted — not AI-modified
1 . A method for inhibiting agglomeration of a block copolymer comprising coupling a plurality of block copolymer segments with a degradable coupling agent and thereafter drying the coupled block copolymer.  
   
   
       2 . The method of  claim 1  wherein the degradable coupling agent comprises thermally degradable.  
   
   
       3 . The method of  claim 2  wherein the degradable coupling agent thermally degrades at temperatures of at least about 300° F.  
   
   
       4 . The method of  claim 3  wherein the degradable coupling agent thermally degrades at temperatures of at least about 325° F.  
   
   
       5 . The method of  claim 4  wherein the degradable coupling agent thermally degrades at temperatures of at least about 350° F.  
   
   
       6 . The method of  claim 2  wherein the degradable coupling agent comprises a tin compound.  
   
   
       7 . The method of  claim 1  wherein at least one block copolymer segment comprises a diblock.  
   
   
       8 . The method of  claim 7  wherein the block copolymer segments comprise at least one of a styrene block, a butadiene block and mixtures thereof.  
   
   
       9 . The method of  claim 1  wherein the block copolymer comprises a hot-melt adhesive.  
   
   
       10 . The method of  claim 1 , wherein the method further comprises transferring the coupled block copolymer to a site of a manufacturing process.  
   
   
       11 . A method for preparing a block copolymer for transport, comprising coupling a plurality of block copolymer segments with a degradable coupling agent and thereafter drying the coupled block copolymer.  
   
   
       12 . The method of  claim 11  wherein the degradable coupling agent comprises thermally degradable.  
   
   
       13 . The method of  claim 12  wherein the degradable coupling agent thermally degrades at temperatures of at least about 300° F.  
   
   
       14 . The method of  claim 12  wherein the degradable coupling agent comprises a tin compound.  
   
   
       15 . The method of  claim 11  wherein at least one block copolymer segment comprises a diblock.  
   
   
       16 . The method of  claim 15  wherein the block copolymer segments comprise at least one of a styrene block, a butadiene block and mixtures thereof.  
   
   
       17 . A method for preparing a coupled block copolymer for use in a target manufacturing process, comprising: 
 coupling a plurality of block copolymer segments with a degradable coupling agent to form a coupled block copolymer;    subjecting the coupled block copolymer to conditions under which the coupling agent degrades.    
   
   
       18 . The method of  claim 17  wherein the degradable coupling agent comprises thermally degradable.  
   
   
       19 . The method of  claim 18  wherein the degradable coupling agent thermally degrades at temperatures of at least about 300° F.  
   
   
       20 . The method of  claim 18  wherein the degradable coupling agent comprises a tin compound.  
   
   
       21 . The method of  claim 17  wherein at least one block copolymer segment comprises a diblock.  
   
   
       22 . The method of  claim 21  wherein the block copolymer segments comprise at least one of a styrene block, a butadiene block and mixtures thereof.  
   
   
       23 . The method of  claim 17  wherein the coupling agent degrades under the conditions of use in the target manufacturing process.  
   
   
       24 . A method of making a block copolymer comprising: 
 forming a plurality of block copolymer segments;    coupling at least two of the block copolymer segments with a coupling agent thereby forming a coupled block copolymer, wherein the coupling agent thermally degrades at temperatures of 300° F. or higher; and    drying the coupled block copolymer into a crumb or pellet form.    
   
   
       25 . The method of  claim 24  wherein the degradable coupling agent comprises a tin compound.  
   
   
       26 . The method of  claim 24  wherein at least one block copolymer segment comprises a diblock.  
   
   
       27 . The method of  claim 26  wherein the block copolymer segments comprise at least one of a styrene block, a butadiene block and mixtures thereof.  
   
   
       28 . A method of making an asphalt comprising: 
 forming a plurality of block copolymer segments;    coupling at least two of the block copolymer segments with a coupling agent thereby forming a coupled block copolymer, wherein the coupling agent thermally degrades at temperatures of 300° F. or higher;    drying the coupled block copolymer; and    adding the coupled block copolymer into a batch for making asphalt.    
   
   
       29 . The method of  claim 28  wherein the degradable coupling agent comprises a tin compound.  
   
   
       30 . The method of  claim 28  wherein at least one block copolymer segment comprises a diblock.  
   
   
       31 . The method of  claim 30  wherein the block copolymer segments comprise at least one of a styrene block, a butadiene block and mixtures thereof.  
   
   
       32 . The method of  claim 28 , wherein the method further comprises transferring of the coupled block copolymer to a site for manufacturing the asphalt.

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